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  #271 (permalink)  
Old 03-July-2008, 07:59 PM
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Originally Posted by Doodler View Post
By the by, ever think you'd live to see yourself typing those words about a planet orbiting another star?
We're living interesting times indeed...
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  #272 (permalink)  
Old 03-July-2008, 08:04 PM
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Three massive Jovians around bright orange giants:
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  #273 (permalink)  
Old 04-July-2008, 01:23 PM
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Has this been mentioned here before? Seems to be old news...

Solar System's 'look-alike' found
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  #274 (permalink)  
Old 04-July-2008, 05:43 PM
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Very old news. He suggests that there very well "could" be other stars out there that "might" host terrestrial planets..
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  #275 (permalink)  
Old 05-July-2008, 06:17 PM
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Exciting, but let's not get too optimistic on this. Maybe it is smaller than most other exoplanets but not something that will be mentioned in the news (an exoplanet that was great news a year or two years ago) or it could simply be a mistaking (i guess those kind of things still happens and the non-existing exoplanet keeps 'its' name).

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Which makes 8b either a dismissed candidate or a potential awaiting confirmation.

By the by, ever think you'd live to see yourself typing those words about a planet orbiting another star?
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  #276 (permalink)  
Old 25-July-2008, 09:37 PM
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Corot-Exo-4b has a 9 day period around a star similar to the Sun (though they did not say its color ), AND the rotation rate matches the orbital period! It ain't that big a planet for a tidal lock. This one is quite interesting, right?
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  #277 (permalink)  
Old 26-July-2008, 12:23 PM
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Quote:
Originally Posted by George View Post
Corto-Exo-4b has a 9 day period around a star similar to the Sun (though they did not say its color ), AND the rotation rate matches the orbital period! It ain't that big a planet for a tidal lock. This one is quite interesting, right?
I think that's CoRot. The star is F0V. The period and the rotation are given as 9.20205 +/- 0.00037 and 8.87 +/- 1.12 days respectively, so synchronicity is not a lock.
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  #278 (permalink)  
Old 26-July-2008, 03:29 PM
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I think that's CoRot. The star is F0V. The period and the rotation are given as 9.20205 +/- 0.00037 and 8.87 +/- 1.12 days respectively, so synchronicity is not a lock.
Yet!
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  #279 (permalink)  
Old 26-July-2008, 09:09 PM
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Originally Posted by timb View Post
I think that's CoRot. The star is F0V. The period and the rotation are given as 9.20205 +/- 0.00037 and 8.87 +/- 1.12 days respectively, so synchronicity is not a lock.
Thanks, I took the article too literally.

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The team has found that the star, which is slightly larger than our Sun, is rotating at the same pace as the planet's period of revolution. This is quite a surprise for the team, as the planet is thought to be too low in mass and too distant from its star, for the star to have any major influence on its rotation.
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  #280 (permalink)  
Old 18-August-2008, 03:25 AM
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Quote:
Originally Posted by George View Post
Corot-Exo-4b has a 9 day period around a star similar to the Sun (though they did not say its color ), AND the rotation rate matches the orbital period! It ain't that big a planet for a tidal lock. This one is quite interesting, right?
Interesting in what way? Do you consider planets with tidal lock more likely to have life than other planets? Guess almost tidal locked planets are even more unlikely to have life than tidal locked planets.
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  #281 (permalink)  
Old 19-August-2008, 09:38 PM
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Interesting in what way? Do you consider planets with tidal lock more likely to have life than other planets? Guess almost tidal locked planets are even more unlikely to have life than tidal locked planets.
That the planet is tidally locked to the star is an assumption; that the star is tidally locked to the planet is the observation (close enough), and it is the latter that is remarkable.
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  #282 (permalink)  
Old 21-August-2008, 12:24 AM
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Ah ok, didn't read that the first time. Yes, that sounds interesting.
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  #283 (permalink)  
Old 28-August-2008, 12:33 PM
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Now this is interesting... a 8-10 million years old hot Jupiter around the low-mass star TW Hydrae (Space.com article). The system is so young that the protoplanetary disk has not yet evaporated. Youngest planetary system by the factor of over 10.
Looks like the detection was spurious. The RV signal can be explained by starspots which are abundant in young and magnetically active stars like TW Hya.
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  #284 (permalink)  
Old 05-September-2008, 02:02 PM
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I'm sick of gas giants being discovered yearly. Don't get me wrong, I really like gas giants because they are usually gorgeous. But I'm just more interested in terrestrial planets - as, I'm sure, you all are. Is there any possibility that the Kepler Telescope discovers more rocky planets orbiting distant stars?
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  #285 (permalink)  
Old 05-September-2008, 10:55 PM
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^
Undoubtedly; I'm hoping Kepler will scoop COROT on this point, all the more so for being more optimised for planetary transit photometry.
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  #286 (permalink)  
Old 07-September-2008, 12:25 PM
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strong evidence for a mass 8.4 Mearth planet, in a quasi-circular orbit and at the period of 8.78 days around Gliese 176. Not that interesting for exobiologists: a=0.066, L=0.022 so it receives over 5 times the starlight that Earth does.
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  #287 (permalink)  
Old 08-September-2008, 11:11 AM
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@ Fiery Phoenix
I might be wrong, but i have an idea that most if not all exoplanet hunters are now looking for other planets than just regular gas giants. Most of them are probably searching areas where we could find Earth 2 whilst others are looking for planets that may be different than Earth but in the Green Zone. Some are looking for the greatest gas giant to find the distinction between gas giants and brown dwarfs and some are searching for all types of planets in a star system already known to find the maximum number of planets in one solar system. All of these exoplanet hunters have one thing in common - they all find gas giants more or less by accident while searching for their particular interesting exoplanets. But when they find one of these planets they don't just leave it for good but spend time to find out as much as possible anyway.

Can't say i know this is how it's done for sure, but that's the idea i've always had.
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  #288 (permalink)  
Old 08-September-2008, 01:32 PM
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Quote:
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@ Fiery Phoenix
I might be wrong, but i have an idea that most if not all exoplanet hunters are now looking for other planets than just regular gas giants. Most of them are probably searching areas where we could find Earth 2 whilst others are looking for planets that may be different than Earth but in the Green Zone. Some are looking for the greatest gas giant to find the distinction between gas giants and brown dwarfs and some are searching for all types of planets in a star system already known to find the maximum number of planets in one solar system. All of these exoplanet hunters have one thing in common - they all find gas giants more or less by accident while searching for their particular interesting exoplanets. But when they find one of these planets they don't just leave it for good but spend time to find out as much as possible anyway.

Can't say i know this is how it's done for sure, but that's the idea i've always had.
You're probably correct. I would say the same thing. They basically just happen to come across the gas giants while searching for a second Earth - more or less. Anyway, the Kepler mission is on the way.
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  #289 (permalink)  
Old 10-September-2008, 01:18 PM
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